Machine for making paper shells.



J; CHESNBY. MACHINE FOR MAKING PAPER SHBLLS,

' APPLIG'ATION FILED OGT.25, 1907. 939,948. Patented NOV. 9, 1909` 3 SHEETS-SHEET l.

J. GHESNBY.

MACHINE POR MAKING PAPER SHELLS.

APPLICATION FILED OGT..25, 1907.

' Patented Nv.9.19o9.

SHBBTS-SHBET 2.

MTA/5565.5:

J. CHESNEY. MACHINE FOR MAKING PAPER SHELLS. APPLICATION 911199001299907.

939,948. Patented Nov. 9, 1999.

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UNrrED srATns rATnNT canton.

JOHN CHESNEY, F PAULSBORO, NEW JERSEY, .ASS-IGNOR TO THE E. I. DU PONT DE NEMOURS POWDER COMPANY, OF XVILIVIING'IO'l, DELAWARE, A CORPORATION OE NEW' JERSEY.

Specification of Letters Patent.

MACHINE FOR MAKING PAPER SHELLS.

Patented Nov., 9, 1909.

1906, Serial No. 347,380. Divided and this application filed October 25, 1907. Serial No. 399,106.

, provement in Machines for MakingPaper Shells, of which the following isa full,

clear, and exact description, reference being 'had to the accompanying drawings, which 'form a part of this specification.

The invention relates to that class of machines for making paper shells for holding explosives i'n which the paper sheets are fed to a rotating mandrel' and wrapped thereon to form a tube, the end of which is folded and closed and which is then slipped oft the mandrel.

The object of the invention is to provide new and improved means to supply and convey the paper sheets tothe man rel.

This application is a division of an application tiled by me December 11th, 1906, Serial No. 347,380, in which the construction and operation of the whole machinear'e set forth. In the present application, only the parts of the machine embodying my invention and. the parts immediately cooperating therewith are illustrated and ldescribed.

In the drawings: Figure 1 is a plan view of the mach-ine. Fig. 9. is a side elevation. Fig. is a front elevation with certain parts omitted for the purpose of more clearly showing the construction of the remaining parts. Fig. 4 is a section on the line 4 4 of Fig. 1. Fig. 5 is an enlarged detail sectional view of the pneumatic picker. Fig. 6 is a detail sectional. view of the exhaust valve. Fig. 7 is an enlarged detail plan View of -the split nut for supporting the threaded.

shaft on which the paper table is supported. 8 is the frame of the machine and 9 the top plate of the frame; 10 is the vertically mov- Aable table holding the sheets of paper a.

T0 is the folder for folding in one end of the tube after it is formed on the mandrel.

80 is the header or puncher that depresses the center of the folded head of the tube and vcompletes the head-forming operation.

90 is the ejector that pushes the finished tube from the mandrel.

The first step in the operation is toapply suction to the picker and feeder 40, thus` lifting the front end of the top sheet, and move the picker and feeder toward the mandrel, thus carrying the front edge of the sheet over the mandrel, which lays hold of the sheet and winds it around the mandrel.`

to form a tube.

The picker 40, shown in detail in Fig. 5, comprises the hollow head 41, connected to and supported by the exhaust pipe 50, the hollow shank 42 dependingvfrom the head 41, and the mouth piece 43 surrounding and sliding ony the shank '42. -The exhaust pipe 50 extends through and -is supported by an arm 45 on the slide 46, and communicates with the exhaust chamber 13. The slide 46 is movable back and forth-011 side-plate 100 as a guide.

Secured to the slide 46 is a bar 47 Whose rear end is attached to a lever' 48' pivote on a bracket 38 on the topplate 9. A spring 51, secured to the bracket 38 and bearing against the lever 48, normally holds the slide 46 in its outer position" against a stop 52v secured to the side-plate 100. A cam'49, on the main driving-shaft 11, moves the lever 48 inwardly against the tension of the spring 51 and moves the slide 46 toward the mandrel.

110 is the driving pulley for the main i shaft.

Interpose'd in the. pipel 50 is a valve 54, (see Fig. 6) normally held, by the spring against its seat to close communication between the exhaust chamber 13 and the picker and feeder 40; but the stem 56 of the valve is operated at the proper time by a cam 59 on the main drivin shaft 11.

When the valve is thus opera ed, the airv construction, being hollow 'and orificed, is

-innerend of the pile when the picker and end of the mandrel and folding in this part of the tube against the head of the mandrel,

the sheet over and against the upperface of the rotating mandrel 20. The cam 59 then passes beyond the valve-stem 56,and the valve closes, shutting off communication between the exhaust cylinder 13 and the picker and feeder 40, and releasing the sheet fed to the mandrel. The cam 49 subsequently passesbeyond the lever 48, which is moved outwardly by means of the spring 51, rel turning the picker and feeder 40 to its original position.

A holder 470, consisting of a plate secured to. the mouth-piece 43, and extending out- Wardly on a level with the lower edge of the mouth-piece, continues to engage the feeder is moved to its farthest inner position, and revents the mouth-piece of the picker and 'eeder from catching in the top sheet or sheets of the paper as it moves' outwardly.

After the sheet is carried back to the mandrel and released from the picker and feeder as before described, .the guide-piece 60 is moved down, the same guiding the edge of the sheet around the mandrel and holding the sheet in contact with the mandrel during the rolling operation. The guide-piece is supported on a lever 61,' which is pivoted between itsv ends on a standard (52 and is raised out of action by a cam 69 on the main shaft (see Figs. 1 and 4) and drops into action by its own weight.

The mandrel 20, which is of a well known detachably secured to a hollow shaft 21, turning in bearings in .standards 22. The hollow'shaft 21 and mandrel 20 are rotated, to roll the sheet upon the mandrel, by means of connections, not shown, from the driving shaft. By other means, not shown, air is exhausted from ,the mandrel before each rolling operation untilthe sheet is rolled into a tube and before the ejector is operated.

After the sheet is wound in tube form., the folder 70 is brought into operation, said folder (shown best in Fig. 2) acting upon the end of the tube projecting beyond the thus closing this end of the tube. The folder is of known construction, consisting of a plate provided with several fingers, which act successively upon the projecting paper to form a corresponding number of overlapping folds. rlhe folder is Vsecured to a gear 71, pivoted on a bracket 73, andthe gear 71 is driven from a gear .-74 on the main shaft 11'. 1v

After the folder has o erated, the headerv is operated. Thehea er consists simply of a punching-head securedto the heatl of a lever 82 pivotally secured in a bearing 83 on the top plate of the frame. The lever is swung upwardly and inwardly to cause the plunger to impinge against the central part of the folded end of the tube, pressing the the mandrel and which is projected toward the outer end of the mandrel at the proper time, causing the inner or open end 'of the tube to be engaged thereby and forced olf the mandrel. l'he collar is operated by means'of aswinging lever 91, pivoted on the shaft 910, whose forked upper end engages the groove in the collar. The lever 91 is operated by means not shown, as the same form nopart of the invention herein claimed.

To enable the sheets on the table 'to be separated, ifthere is any tendency for them to stick together, a blow pipe 75 is provided, said pipe extending-from the pressure cylinder 12 along the side of the machineand through the side plate to a point alongsidethe upper sheets of the pile. Ad-

mission of air through the pipe is controlled by the hand valve 7G. Y

The table is supported on' the top of an upright screw shaft 15, whose flanged upper end lits rotatably within a capV 102 on the under side of the table. The screw-shaft extends through a ,two-part nut 16 supported on the top plate 9 of the frame as hereinafter described.

The bottom of the shaft turns in a bear-` In the operation of the machine, after the`l recession .of the picker and feeder 40, the pawl 157`-turns the ratchet'l a distance of one tooth, thus imparting a partial turn to the screw-shaft. This causes the screwshaft to have a slightnpward movement due to its engagement with the fixed nut 16.

aov

The parts are so proportionedthat the extent of the upward movement of the screw! shaft just equals the thicknessof a sheet of paper. The top of the pile ,is thus maintained on a constant level.

lVhen 'one p'ile of paper is exxhausted and another pile ispput in place, the two parts of the put 16-are separated, permitting the shaft to drop. This is effected-by pushing Vwhat i claim and desire to toward each-other thearms 16() secured to the two part-s of Vthe nut and pivoted on the pin 161 t see F ig. 7 These arms project forwardly through a cut-away part of the aange 162 of the top-plate 9. The two parts et the nut are held together by means et a spring 163 connecting lugs 1G41 on the rear extensions 165 of the two parts of the nat. 'ihe nut is also supported in position a clamp 166 secured to the.- top plate 9 and engaging the extensions 165'.

Te prevent the' paper on the table from creeping forwardly., there isprovided the holding-plate 191 secured tothe top-plate 9, which Yextends up to a point that enables the top :sheet to be fed over it to the mandrel.

192 is a stop secured to the table and eX- tending in front of the pile and preventing the paper from slipping outwardly;

is a holder at the side of the paper, the same consisting of an angle plate secured to the table and extending up alongside, and also overhanging the pile.

Having now fully described my invention,

protect by Letters Il )atent is 1. in a machine for making paper shells, the combination with the table for supporting the pile of paper7 of means for conveying the paper sheets from the table, an upright screw shaft on which the table is sustained, means to tprn the screw-shaft, there by elevating the table, a two part nut engaging the screw-shaft, arms extending forwardly from the two parts respectively ot' the nut and pivoted between the nut and their ends, whereby the parts may be retracted by moving the free ends of said arms toward each other, lugs extending rearwardly from the two parts respectively of the nut, a spring between said lugs normally holding the two parts of the nut in engage'- ment with the screw-shaft, means for supporting the 111113,.' and driving mechanism' adapted to rotate the shaft while permitting it to move vertically. y f

2. In a machine for making paper shells, the combination withthe table for supporting the pile of paper, of a pneumatic picker i overlying the pile, a slide on which the picker is supported and by the movement of which the picker is moved horizontally into and out of position to select a sheet of paper, an exhaust c hainber, a. pipe connecting the exhaustchamber and the picker, a springpressed valve normally closing the pipe7 the driving shaft, a cam thereon adapted 'to cperate said valve to open the pipe7 a springpressed lever connected with the slide and normally holding it in one position, and a cam on the driving shaft adapted to operate saidV lever and thereby move the slide toward its other position.

3. In a machine for making paper shells,

vthe combination with the table for support- I.ing the pile of paper, or' a pneumatic picker overlying the pile, means to reciprocate the picker, outwardly and inwardly respectively, into and out of position to select a sheet ot paper, means to exhaust air from the picker when the same is in position to select a sheet of paper, and a holder moving with the picker and extending outwardly so as to overlie the inner' edge of the pile when the picker is in its inner position, thereby preventing the picker from catching in the paper when moved outwardly.

11. In a machine for making paper shells, the combination with the machine frame, ot

Aa vertically movable table for supporting the pile of paper7 a side-plate secured to the frame and extending above and alongside the table7 a slide movable back and :forth on the side-plate as a. guide, an exhaust pipe carried by said slide and overhanging the table, a hollow pneumatic picker carried by and depending from and communicating with said'exhaust pipe, a valve on said pipe, a. driving shaft, and means operated thereby to respectively reciprocate the picker and control the operation of said valve.

In testimony of which invention l have hereunto set my hand, at Paulsboro, on this 21st dayof October, 1907.

' JOHN CHESNEY.

Witnesses:

WILLIAM J. AnAiisoN, JOHN H. BROWN. 

